Isabella Sophie Tweddle (born 27 May 1999), better known under the stage name Billie Marten, is a British singer-songwriter and musician from Ripon in North Yorkshire. Her stage name came from her fam
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b644c0eefe5ae1c45db745a2910cc60219448333f64456f937347d280066f5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bb730dc-2af6-439f-8a44-be10da6fbf5e.json and https://artists.proofprofile.net/proofs/artist/1bb730dc-2af6-439f-8a44-be10da6fbf5e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61793931bbe4598d67f2ad309be8b515c8dfc20b172371711645a5d314cd7dc4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBARL1501333.
Writing of Blues and Yellows (Deluxe Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5221f1d60fb6fad1c21c5b09f5cfd2a7553498fd97ec180d0ae945a6804a52. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM72005715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729904abcd850f6fd2601b426e6e754acad03d91bbdb48155e3d12c9c5151fd2. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:58:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM72005710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5221f1d60fb6fad1c21c5b09f5cfd2a7553498fd97ec180d0ae945a6804a52. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM72005715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b190458b94f310a9ea8009f16e2425f920e0c8133398538aa777444a26a7f6. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2136965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44f6fba6510382514f42077774c44e897ed173b4ad315552d0540599cb5b976. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM72106734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b29bd78c8b02bed2fb449d6e81007dd362af3583fb401321dc13a768f4ceb2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM72106591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d851f7ba4a20f9429228da44f41701de28e322973da6fc83478f34fa927693. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM72106590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295d875ee06cc10ec46ee6ca76056430c5018470b8ec2a856cdfecf9ce48c39c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM72106592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de95902300ce3a47c82e699473fdc10c1fe14e7887e741638bf3c54ac8a73db. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM72207722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de95902300ce3a47c82e699473fdc10c1fe14e7887e741638bf3c54ac8a73db. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:07:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM72207722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de95902300ce3a47c82e699473fdc10c1fe14e7887e741638bf3c54ac8a73db. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:45:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM72207722.
This Is How We Move - Audiotree Live version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d624f80b118bedc493dfa51c3c498ef3fcc9a1709ce989f1cd4cb6032266eaa. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM99V2308101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9241782fb2c00d7c0f74751a0e332c76176819013bbaf68fb9cec9aa2ea411. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM99V2308103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b2329ffea8b79a79df837d49001f80a7414272b66b245c5838df8d5458ecb1. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM99V2308104.
I Can't Get My Head Around You - Audiotree Live version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a47cd890f8187840e837de464a9905ddd802f781b4607885e6124b30ae4394. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM99V2308105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef847426b571be94e7e878e9f5ceb6e5b0b95cef2720b0145be9a9955ff84b6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM99V2308106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f3a408e7e49b7261f3f019da74d4bc2181e77143d930984bfacc1898eed8cc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBVHN1800018.
How Do You Leave - Billie Marten & Ellie Mason Re-edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9443ca262a092e9d3a289a58672be31166cceab9d4b2b741b298af99be3d5a75. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB6TW2200097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d5ed6b2c7a908cc59e72ff276f15528400ff2ba5619b261c7981c69a37f261. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM72003215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa017098cd6ffb07b1ae7f9d951fe0e4910c0d4aabf8df1541f85c061e4cd59b9. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM72207723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc841a45e634389ebaea8112fc33bfd29b27400000dbe9cb28d2fd2e7c6a9f25e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM72207714.